Dental equipment stand



March 20, 1945.

R. c. ANG ELL 2,371,597

DENTAL EQUIPMENT STAND Original Filed April 5, 1939 10 Sheets-Sheet lZmnentor fioerf (71911 622,

(Ittomeg March 20, 1945.- ANGELL DENTAL EQUIPMENT STAND Original FiledApril 5, 1959' 10 Sheets-Sheet 4 March 20, 1945.

R. C. ANGELL DENTAL EQUIPMENT STAND 10 Sheets-Sheet 5 m a m m 6 Z. m 5 7MM ,a 2 5 5 1 m. i w m 4. m u.M||\|||l||||||||||||||||||||||||lll||1|||lh||1| l l 1 l l l I 1 I l l a.W| I m W Original Filed April 5, 1959 I I f flgw ggg gg gg g z 6 q a mw March 20, 1945. R Q ANGELL 2,371,597

DENTAL EQUIPMENT STAND Ofiginal Filed April 5, 1939 10 Sheets-Sheet 6FIG; 7. 472

3nventor M4 (Zttorneg March 20, R. c. A NGELL I 2,371,597.

- DENTAL EQUIPMENT STAND OriginalFiled April 5, 19:59 10 Shets-Sheef. Q7

l 1 lllllll 27.2 192 lllzlll 0| 1 n Enventor Robert C. fln ell,

March 20, 1945. R Q N ELL 2,371,597

DENTAL EQUIPMENT STAND Original Filed April 5, 1939 1O Shets-Sheet 8March 20, 1945.-

- DENTAL EQUIPMENT smm .Original Filed April 5, 1939 10 Sheets-Sheet 93nnentor 71 0,6612 C 1712 g/ZZ,

(Ittorneg R. C.\ANGELL 7 2,371,597 I March 20,1945.

R. c. ANGELL DENTAL EQUIPMENT STAND Original Filed April 5, 1939 10Shee'tSQ-Sheet 10 FIG. 14.

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3nventor attorney Patented Mar. 20, 1945 UNITED STATES PATENT OFFICElJENIAL ZZZZIiZZIN'rS- AND i S Q The S. S. White Dental Manufacturing.Company, a corporation of Pennsylvania 1 i Original application April 5,iesaserial No. Q 266,174. Divided and this application October27,1942,SerialNo.463,474 i i This application constitutes a divisionfrom my copendin-g application Serial No. 266,174, ,filed April 5, 1939,which issued into Patent No. 2,317,971, May 4, 1943,, and isspecifically directed to the cuspidor and its associated mechamsm.

My invention relates particularly to that class of dental equipmentassemblages that are adapted to be located adjacent to a dentaloperating chair and arranged to support, within easy reach of theoperator, various instruments, implements, ap-

pliances and devices employed in the practice of dentistry, and isespecially directed to its simplified construction, easy accessibilityof its enclosed mechanism, wide range of relative movement of theassociated parts, and the consequent flexibility in the use of suchinstruments.

The principal objects of my invention are to provide an assemblage ofdental equipment devices embodied in stand or pedestal that iscompact,pleasing in appearance, convenient to operate, readily assembled andtaken apart and that affords a maximum degree of utility in the practicef the dental profession. Other objects of my-invention are to provide anequipment assemblage comprising a standard or pedestal upon whichvarious relatively adjustable equipment and dental devices may beconveniently moved into relatively different operative positions aboutthe common axis of said standard or pedestal. Further objects of myinvention are to provide a dental equipment stand assemblage in whichthe frame of the supporting standardis composed of a plurality of framesections relatively superposed one upon another and secured together toform asupporting skeleton standard structure upon which the variousequipment devices may be adjustably supported,and in which a shell orcasing is formed of a plurality of easin sections having meanscooperative with complementary means on said frame sections to causesaid casing sections, when forced into their rela:

tive normal positions to closely embrace and enclose the assembledskeleton frame to form a.

pedestal structure or standard.

Other objects of my invention are to provide .a dental equipment standhaving a dental engine having its operative part connected to be drivenya motor having its axis of rotation normally common to the axis of saidstand and engine mechanism.

My invention also includes'a dental equipment standor pedestal having acuspidonmounted to swing horizontally about the axis oi said pedestaland having, it waste water outlet connected by a swivel joint with awaste: water pipe disposed in coaxial relation with the stand orpedestal, and having a water niche in the wall of said pedestalproviding convenient space for a drinking glass or tumbler and asuperposedfaucet for directin water into said tumbler, both beingdisposed in an alcove within the circumferential outer surface of thepedestal shell sections or casingand pronection terminals for gasand'air which are connectedby flexible tubing spirally coiledabout thecommon .axis of said swingablesupporting arm and stand with suitablydisposed stationary connecting terminals of gas and air conveying pipesextending upwardly through the stand or pedestal. wSpecifically stated,the form of my invention as hereinafter described, comprehends anequipment stand comprising a pedestal of generally cylindrical formationhaving a flanged base and a dome-like upper extremityfrom which projectsa cylindriform engine mechanismmounting, and having horizontallyswingable arms disposed at relatively difierent levels and respectivelycarrying abracket table and a cuspidor. Said pedestal is preferablyformed-of a plurality jofseparable frame sections each designed toprovide specifi cally for its intended purpose and assembled one uponanother in a prescribed order and secured together with their respectiveaxes coincident with the axis of the thus assembled, standard whichprovides a supporting frame standard that 1 maybe enclosed bya pluralityof readily removable andreplaceable substantially semicylindric'alcasing section preferablyof' sheet material assembled to form thecylindriform pedestal structure. The swingable arms forthe bracket tableand c'uspidor areprovided with suitably formed casing sections of sheetmaterial which have their inner semicylindrical ends in coincidentalinement withthe cylindrical wall formed by the adjacent casingsections and serve to form therewith the complete shell en losure forthe above described assembled supporting standard,

arm in section; Fig. 4 is a fragmentary front elevational view of thebase frame section and a fragment of the lower portion of the main framesection and showing the inlet and waste pipes extended therethrough withcertain portions thereof indicated in section; Fig. 5 is aplansectionalview of the structure assemblage shown in Fig. 4 asindicated on the line 55 in said figure, the casing sections shown inFig. 4. being omitted from Fig. 5 for convenience of illustration; Fig.6 is a central vertical sectional view of the main body frame sectionshowing the piping connections extended 'therethrough and including thewater inlet valve and condensate relief valve; Fig. '7' is a centralvertical sectional view showing upper and lower fragments of the mainbody frame section and the superposed cuspidor frame section and waterniche frame section; Fig. 8 is a side elevational view of the cuspidorarm together with. fragments of the pedestal associated therewith, andshowing mounted thereon the warm water syringe with its flexibleconnector, the

assembled by building one upon the other about a unitary common verticalaxis in the order named to provide a skeleton standard structure uponwhich the various operating appliances, devices and parts, to behereinafter described, may be mounted for convenient utilization.

The base section I is provided with the enlarged base flange 6 adaptedtorest upon the floor and to be secured thereto by the bolts 1 extendedthrough suitably spaced apertures 8, and has four upwardly'extendinglegs 9, terminating in a substantially octagonal perforated elevatedplate or platform [0, having the circular apertures ll, I2, l3 and i4,and the elongated aperture l5, through which piping and electricalconduits may extend, said platform being provided with two diametricallyopposite outwardly projecting lugs [6 each having a vertical notch orslot- I! cut or otherwise formed therein, and indented for a purpose tobe hereinafter described.

, Superposed upon the base section I, is the main body section 2 whichcomprises the relatively spaced parallel plane side walls l9 andrespectively terminating at their lower ends in the annular horizontallyextended flange 2| and at their upper ends in the annular horizontallyextended flange 22, and being joined vertically by the transverse wall23 which is inset from the saliva ejector with its flexible connector,and the l flush mechanism with its nozzle; Fig. 9 is a plan view of thecuspidor arm and its mountingthe cuspidor arm frame section, saidmounting and the casing for the cuspidor arm being shown in "section forconvenience of illustration; Fig. 10 is a side elevational view of thecuspidor arm of the cuspidor drain conduit; Fig. 13 is a plan edges ofsaid walls l9 and 20 but preferably disposed nearer to the rear edges ofsaid walls, as shown in Figs. 5 and 7.

The transverse wall 23 terminates short of the annular flange 2| andmerges into the horizontally extended shelf 25 projecting rearwardlyfrom the lower end of said transverse wall 23 and having its curved freeedge 26 joining the free vertically disposed rear edges of the sid wallsl9 and 20, as shown in Figs. 3 and 5.

Said transverse wall 23 is slightly offset at 21, its upper portion, seeFig. 7, and merges horizontally into the flange 22, the horizontalportion being provided with the aperture 28 for the convenient passageof an electrical conduit 29 therethrough, as shown in Fig. 7, whichconduit is sectional view taken on the line I3-I3 in Fig. 11,

the cuspidor drain conduit and certain associated parts being shown inplan view for convenience of illustration; Fig. 14 is a' horizontalsectional view of the main body section taken through the main watercontrol valve on the line l4-l4 in Figs. 6 and 7; Fig. 15is a centrallongitudinal vertical sectional view of the warm water syringe holderwhich is shown mounted On the cuspidor arm in Fig. 8, the upper portionbeing shown in elevation for convenience of illustration; and

Fig. 16 is a transverse vertical fragmentary sectional view takenthrough the cuspidor arm on the axial plane of the warm water syringeholder and showing its means of attachment, the plane of said sectionbeing normal to the plane of the sectionshown in Fig. 15 and takenon'the line Iii-l6 in Fig. 8.

In said figures the frame forming the supporting standard comprises thebase section I the main body section 2, the combined water nicheandcuspidor section 3, accessory-table-armsec tion 4 and the dome or motorsection 5, all being adapted to direct electric line wires from asuitable source of supply to the distributing mechaanism not shown, butwhich is arranged to be disposed in the upper dome section 5. Said Iflange, as shown in Figs. 6 and 7,.is provided at its inner edge withthe upwardly extending rectangular rim bead 30.

The main body section 2 is supported on the base section I and has thefour feet 3! which depend from the under surface of the annular flange2! in relatively spaced relation and rest upon the plate or platform Illof base section I to. which the main body section 2 is rigidly securedby the bolts 32, shown in Fig. 3.

The flanges 2i and 22 ofthe main body section 2 are provided in theirouter peripheral edge with the diametrically opposite verticallydisposed slots or notches 35 and 36 respectively which afford attachmentof the casingmembers, as will be hereinafter described.

The combined niche and cuspidor mounting section 3 is superposed uponthe main body section 2 and comprises a unitary structure having thecylindriform wall 31 provided with a lower annular horizontal flange 38resting upon the upper'flange 22 of said main body section 2, a medialflange 39 from which rise the four posts or standards-l0 terminatingupwardly in the top plate or cap il unitary therewith and having a 38 isprovided with the rabbet 50 arranged to receive the rim bead 30 on theflange 22 of the main body section 2, and said flange 38 is rigidlysecured to said flange 22 by the bolts 5|, as shown in Fig. 3. Theflanges 39 and-43 are each provided in their peripheral edges withdiametrically opposite notches or slots 52 and- 53 respectively, thepurpose of which will be later referred to.

The accessory table arm section lis superposed upon the water niche andcuspidor mounting section 3, and comprises a hollow circular hub 54,provided with the horizontal flange 58 disposed intermediate of itsaxial length and providing a flat horizontal under surface aifording acircular roller bearing track 60 in suitably opposed spaped relation toth circular track 44 on the cap 4i. The upwardly extending portion ofsaid hub 54 is arranged to support the annular shelf 62, and is securedto the section 3 by the bolts 51, see Fig. 3. I

The motor section 5 is superposed upon the accessory table-arm section 4and serves as a crown-piece or dome for the skeleton standard structurethus assembled. Said motor section 5 comprises the annular floor 65resting on the circular hub 54, and to be secured thereto by the bolts66, shown in Fig; 3, and from which floor 7 65 rise the diametricallyopposite U-shaped standards 61 respectively curving inwardly at theirupper extremities and merging into the annular head 69 forming a pocket10 arranged to receive specially designed dental engine mountingstructure.

, The engine arm mounting structure includes the engine arm supportcomprising the cylindrical hub II disposed coaxially with the axis ofthe assembled standard structure, and having the horizontally disposedflange I2 engaged in the pocket I in rigid relation to the motor sectionby the bolts I3, as best illustrated in Fig. 3.

The hub II of the engine arm support is normally encircled by the spacersleeve 14, above which the engine arm bearing '15 having the radiallyextending horizontal bearing flange I6 is disposed in threadedengagement with the upper extremity of the hub I I.

I in axial registry with the supporting standard.

The accessory table arm 91 is adapted to oscillatably swing horizontallyabout the unitary axis of the standard structure upon which it issupported and comprises the substantially semicircular bearing mounting98, the rim of which embraces the hub 54 in concentric relation thereto,and as best illustrated in Fig. 3, the table arm 91 ,is supported forhorizontal movement into different positions convenient to the operator,by the supporting rollers 99 respectively mounted on the headedtrunnions I00, which project inwardly from the bearing mounting rim 98.I

In order to retain the accessory table arm 91 structure or pedestal, itis provided with the horizontally disposed equally spaced rollers IOIarranged to traverse the cylindrical track 45, the rollers II with theiraxes of rotation in a vertical plane and journalled to rotate on theheaded shaft I02 which, as shown in Fig. 3, extends through anaperturein the boss I03 on the bearing mounting 98, and which is engaged instationary relation therewith by the nut I04 threaded thereon. Thus itwill be seen that the accessory table arm 91 may freely revolve aboutthe axisof the standard floor and into the base section I and is securedto the base platform I0 by the fitting I06 and nut I01 and whichterminates in a reduced threaded projection I09 to which a coupling I I0i threadedly attached.

Said coupling IIO comprises the stufling box I I I containing thepacking .I I2 and the gland nut II3 through whichthe lower end of thepipe I I 5,

which conveys water through the pedestal, extends and by which it isconnected in watertight relation to the water supply pipe I051.

The water pipe H5 extends upwardly through the pedestal and is connectedwith themain water controlling valve'I I6 which, as best shown in ectionin Fig. 14, comprises the inlet passageway .I I1

leading into the valve chamber H9 and controlled by the valve plug I20which is arranged to cooperate with the valve seat .I'2I, and which hasthe valve stem I22 in threaded engagement with the bore I23 of thebodyof said valve H5.

The engine arm bearing I5 supports for rotatable movement, the inwardlyflanged swivel ring known construction, but not herein illustrated.-

The mode of actuating the dental engine driving pulley 92 differs widelyfrom that heretofore employed in that the driving pulley 92 is carriedby the driving pulley extension shaft 93 which is coaxial with thearmature 95 of the electric motor 96, and with the vertical axis ofthepede'stal in the dome of which the electric motor is mounted. I v

Said valve stem I22 extends through the pack-- ing I25 of the stufiingbox I26 including the gland I21 and gland nut I29 and is provided withthe controlling handle or knob I30 which is engaged on the squared endI3I of said stem I22 by the knob retaining screw I32. I I

As shown in Figs. 6 and 14, the body of the valve- .IIS extends througha suitably provided aperture in the side wall I9 of the main bodysection '2 of the supporting standard and has the wings I and I36, seeFig. 6, which are secured to the annular boss I31 on said side wall I9by the tap screws I39 and I40. I

As shown in Fig. 14,-said valve II'6=has the passageway I42 connectedwith the valve chamber I I9 and extending through the internallythreaded spout I43 to which the threaded nipple I45 is attached; Thenipple I45 is connected by the coupling-fitting-nut I46, of well knownconstruction, with the water niche supply pipe I4'I which extendsupwardly through the pedestal, see Fig. 7, and is connected, as bestshown in Fig. 12, through the I nipple I49- and its coupling-fitting-nutI50 withthe valve chamber .II in the Water niche controlling valve 52..

- Thevalve chamber I-5I', as best illustrated in Fig. 7,. i connected,as best shown in Fig. 12, by the/nipple I53 and its coupling-fitting-nutI55 with the pipe I56 extending upwardly through the water niche andcuspidor section 3 to the water niche spigot I51 which ha -its spout I59directed downwardly through the ceiling I60 of the water niche formed bythe concave wall I'6I which substantially conforms to the upwardlyextending rear flange I62 of the water niche basin I63, said spigotbeing positioned to direct water into the water glass or tumbler .I-65which rests upon the removable water niche drain cover plate I66, aidtumbler beingillustrated by dot-and-dash lines for convenience ofillustration. I

. Flow of water through the spigotl51 into the water niche i controlledby the valve plug I69 which is manually actuated by turning theoutwardly projecting knob I and which cooperates with the valve seat I1Iupon the opposite sides of which .the pipes.l41 and I 56 connect withthe valve chamber I5I, the inlet pipe connecting through the nipple I53with said valve chamber I5I forward of the valve seatlli, see Fig. '7,and the outlet pipe I56 being connected through the nipple vI59-vviththe valve chamber I5I rearward ofsaidvalve seat I11, a illustrated inFigs. '7

and 12. i As best shown in Fig. 12., the concave wall I6I hasit lateralmargins I12 extended rearwardly in relatively parallel planes andrespectively turned outwardly to form laterally directed flanges I13which provide means for attaching said wall I6I to the bosses I and I16,see Fig. 3, on the forward posts or risers 40 of the Water niche andcuspidor mounting section 3.

The water niche controlling valve I52 includes a rearwardly extendingenlarged body I11 provided with a drain pocket I18 having the laterallyextended wings I 19 by which said valve I5'2 is attached to the waterniche and cuspidor mounting section 3, and supported in the recess 41 bythe screws I 80 engaged in the threaded apertures I8I The water nichebasin I63 may preferably be formed of glass or other suitable materialhaving atransversely elongated dished recess I82 forming the forward rimI83 as illustrated in Figs. 7 and 12, and having the counter recessforming the annular seat I85 arranged to receive the drain cover plateI66, beneath which depends the water niche basin drain outlet I86directed into the drain pocket I16 from which waste water is directedthrough the noiseprevention trap I81 'and the pipe I86.

I99 at the outer free end thereof and terminating inwardly or rearwardlyin the abutments 200 and MI disposed upon the diametrically opposite endportions 202 and 203 of the concave semi-annular channeled inner rim 205of said frame plate I93.

As best shown in Figs. 1, 9 and 11, the channeled rim 205 is fitted toclosely embrace the Said water niche basin I63, as illustrated in Fig.

12, is provided with wings I89 extending outwardly from its ends andresting upon the lugs I90 projecting forwardly from the forward posts orrisers 500i the water niche and cuspidor mounting section 3, and saidbasin is secured thereto 7 plate I93 provided with the bosses I94 andI95 and merging at its perimeter into the depending apron forming theside walls I96 and I91 connected forwardlyb-y the semicylindrical endwall the boss bearing rib 49 encircling the water niche and cuspidormounting section 3 being free however to slide thereon to permitthecuspidor arm to revolve thereabout, and said rim 205 is maintained inproper. engagement with said rib 49 which provides a supporting tracktherefor, by the strap 206 preferably formed of spring metal and havingits end margins turned outwardly, see Fig. 9, to form attaching lugs 209and 2 I0 abutted against the cuspidor frame abutments 200 and NI andengaged therewith by the screws 2! I and 2I2, the intermediate bowedportion 2I3 of said strap engaging the outer cylindrical surface of therib 4 9, as best shown in Figs. 9 and 11.

As illustrated in Fig. 9, the swinging movement of the cuspidor arm I92is limited to about ninety degrees by the stop lug 2I5 which projectsradiallyfrom the cylindrical wall 31 of the water niche and cuspidormounting section 3, into the path of'the lugs 2I9 and 220 which projectupwardly from the upper horizontal wall of the semi-annular rim 205.

As best shown in Fig. 9, the frame plate I93 is provided with theaperture 223 extended through I94 and the aperture 225 extended throughthe boss I95, and said plate. I93 is also provided with the opening 226through which the cuspidor 229 may be connected with the drain or wasteoutlet, and said plate is recessed downwardly centrally along the inneredge of said opening 226 to provide the attaching shelf 230 to which thecuspidor drain'conduit 23I is secured by the screws 232, see Figs. 9 ad11, in engagement with the threaded apertures 233 in the wingedattaching pad 235, see Fig. 13.

As shown in Figs. 9, 12 and 13, the drain conduit 23I is provided'withthe winged attaching pad 236 having the apertures 231 through whichscrews 239 extend in threaded engagement with the lower horizontal wallof the semi-annular rim 205. h

At the forward end, said cuspidor drain conduit 23I is provided with theexternally threaded upwardly extended nipple 242 providing an insetannular shoulder 24.3 upon which the hub 245 of the cuspidor bowl 229rests with the interposed annular gasket 241 of water resistantresilient material, which is compressed to insure a watertight seal bythe annular nut 249 having the inturnedflange 250 engaged with thegroove 25I in the outer cylindrical wall of said hub 245.

connected by the fittings 265 and 266 with the drain or waste pipe 262,as illustrated in Fig. '1.

The drain or waste pipe 262 extends downwardly through thesupportingstandard preferably being coaxial therewith and is connectedwith the drain or waste outlet pipe 269 which extends upwardly throughthe fioorand into the base section I, as shown in Fig. 4. The opposedends of said drain or waste pipes 262 and 269 are secured for firmnessto the platform I0 of the base section I by the fitting 210 and nut 21Iand convey the waste drainage from the cuspidor bowl 229 and water nichebasin I63.

As shown in Figs. 8, 9 and 11, the cuspidor supporting, arm includes areadily removable and half-sections have their inturned edge margins,

211 and 268 respectively engaged betweenthe lugs 219 and 280, while theinner or right hand ends of said half-sections have their inturnedmargins engaged with the depending extension 285 of the bracket 203which extends outwardly from the strap 206, see Figs. 9 and 11, and towhich said half-sections are engaged by the screws 289 and 290. i

As best shown in Fig. 11, the cuspidor supporting arm I92 carries theannular band 292 having its inturned flange 293 supported on the flathorizontal frame plate I33 by the suitably spaced springs 295 whichencircle the headed posts'296 in threaded engagement with the plate I93.Said band 292 is forced upwardly. by said springs 295 to engage itsupper edge with the under surface of the cuspidor bowl 229 and tothereby close the space between the cuspidor and upper edge of thecasing comprising the half-sections 212 and 213.

As shown in Figs. 9 and 10, the side walls of the casing sections of thecuspidor supporting arm are maintained in proper spaced relation by theabutments 200 and 20I and by the vertically extending ribs 299. x

The valve I I6 is connected by the flexible tube 300 with the fitting30I which is secured to the drain conduit 23I, and which is connected bythe pipe 302 with the valve body 303 by the coupling 304. Waterdistribution to the several parts'and implements carried by the cuspidorsupporting arm is efiected through the valveblock or body 303 from whichwater is conveyed through the pipe 305 to the cuspidor, through the pipe306, to the water heater, and through the pipe 301 to the salivaejector, as will be later described.

Water that is conveyed from the valve ,body 303 through the pipe 305 iscontrolled by a combination valve-plug and seat of well knownconstruction, which is ,arranged to be actuated by the valve controllingknob 30 9 to direct, retard or stop, as desired, the flow of waterthrough said pipe 305 which is extended upwardly through the aperture225 in the frame plate I93 and through the cylindrical upright housing3I0 and extends horizontally through the pipe shielding arm 3I2 which isdirected forwardly and at the freeend of which the water conveying pipe305 is connected to the cuspidor flush nozzle 3I3 by the swivel joint3I5. As shown in Fig. 8, said flush nozzle 3I3 is directed downwardlyinto the cuspidor bowl 229 adjacent to the inturned edge 3I6 of saidbowl and has its free end portion 3" curved into a horizontal outlet 3I9so as to direct water spirally over the floor 320 of the cuspidor bowl229. v

9 of the saliva ejector 331 may normally rest when Water that isconveyed from the valve body 303 through the pipe 301 is controlled byavalveplug and seat of well known construction which is arranged to beactuated by the valve controlling knob 325 to control the flow of waterto mechanism of water ejector type which may be housed within thecylindrical upright housing 3I0 and which is arranged to produce suctionin the saliva conveying pipe 326 and effect discharge of saliva throughthe discharge pipe 321 into the cuspidor drain conduit 23I.

The saliva conveying pipe 326, as shown in Fig.

9, is connected with a chamber 329 in the projection330 which extendsforwardly from the forward end of the cuspidor drain conduit 23I, andsaid chamber is connected by the connection nipple 332 and fitting 333through the flexible saliva conveying tube 336, see Figs. 8, 10 and 11,with the saliva ejector 331which, as shown in Fig. 8, may beconveniently supported, when not in use, upon the saliva ejector bracket339.

As shown in Figs. 1, 3, 9, 10 and 11, said bracket 339 projectsoutwardly from the forward end of the cuspidor supporting arm and issecured by the screws 342 to the .forward semi-cylindrical end wall I99of the apron that depends from the frame plate I93, of the cuspidorsupporting arm, and said bracket 339, as shown in Figs. 9 and 11 has thecircular aperture 343 through which the flexible tube 336 is adapted toextend when the saliva ejector is lifted and drawn outward by theoperator to be inserted into the mouth of, the patient that may beseated in the chair, the base 345 of which is indicated by thedot-and-dash lines in Fig. 1. i i

a As shown in Figs. 8, 9 and 11, the aperture343 is formed of tworelatively different diameters and consequently provides a convenientannular shoulder 346 upon which the enlargedbody 341 not in use,with itsflexible connecting tube 336 loped as particularly illustrated in Fig.8'.

The pipe 306 conveys water fromthe valve block or body 303 to the waterheater reservoir 350 and is removably connected with its inlet nipple352 by the connection fitting nut 353.

The water after being heated by contact with the electrical heatingelement 355 within the water heaterreservoir 350 is discharged therefromthrough the nipple 35B and pipe 351 which is "connected therewith by theconnection fitting 360, and is directed into the bottom of the valve 36Ias shown in Fig. 10. l i

The flow of warmed water from the water heater 350 is controlled by thevalve 36I to which said water heater 350. is connected by the pipe 351and said flow is arranged to be regulated by the manipulation of thecontrolling knob 362, which not only controls the flow of warmed waterthrough the outlet fitting 363 of the two-way valve 3BI, of well knownconstruction, but is also,

- 310, of well known construction, which, as best illustrated in Fig. 8,is normally supported by the cylindrical water syringe warming holder.31I comprising the outer cylindrical casing 312, which is attached tothe boss I94 on the frame plate I93 and projects upwardly from the topwall 215 of the-cuspidor, supporting arm casing comprising the casingsections 212 and 213.

As illustratedin Fig. 8, the lower or inner portion 315 of the syringebody 316 depends into the bore 311 of said syringe warming holder 3H,and said syringe may be freely withdrawn therefrom for use in directingwater into the patients mouth, such withdrawal causes the loopedflexible tubing to be drawn upwardly through the bore 31.1 of thesyringe warming holder 3" until the weighted stop 319, which isadjustably disposed on the flexible tube 369, abuts against the lowerend of the inner cylindrical concentric tube 386 of said warming holder,see Figs. 15 and 16.

Said weighted stop not only serves to limit the length of flexible tube369 that may be withdrawn through the bore 311, but also tends when thetube is substantially fully extended, to serve, by its weight, toautomatically retrieve said flexible tube when the operator relieves thepull thereon in'his efiort to replace the syringe 316 in its holder 31I.

As shown in Fig. 16, the inner cylindrical tube 386 of the syringewarming holder 31l depends through the aperture 382 in the boss I94 andis provided intermediate of its length with the annular attaching flange383 which rests upon the heat insulating'washer 385 on the top wall 215of the casing section 312and is secured to said annular boss I94 on theplate I93 by the screws 386 and .381 extended through suitably alinedapertures in said flange 383, in said top wall 215 .and into suitablyprovided apertures 3'89 and 396 in said annular boss I94, being rigidlysecured therein by threaded engagement with the headed bushings 392 and393 extended upwardly into saidapertures-389 and 396.

The upper end of the tube 386 is externally threaded and has the capferrule 395 threadedly engaged'therewith and is also in threadedengagement with the upper end of the outer cylindrical casing 312, thelower end of which terminates in theenlarged base 396 which embraces theflange 383 and conveniently conceals the heads of the screws 386 and381.

As shown. in Fig. 15, the annular space between the outer cylindricalcasing 312 and the inner heating element 399 including the leading-inwires 4'66 and 4 6I which are protected from accidental contact withsaid casing 312'and tube 386 by the sleeves 4'62 and 463 formed ofinsulation material. i

The wires 466 and 46! extend downwardly through the apertures 465 and466 in the flange and through the aperture 382 in the boss I94 and topplate I93 of the cuspidor supporting arm frame, and said'wires 466 and46] .extend outwardly through said frame and casing to the bindingscrews 469 and M6 respectively on the relatively separated metalconnection plates 412 and 413 which are mounted on the bracket M securedto the outer rim margin of the top plate I93 by the screws 4I6.

The connection plates 4|2 .and 413 are, respectively provided with thebinding screws 419 and 426 which are connected by the wires 422 and 423with the electric heating element 355 which extends into the waterheater reservoir 356 .but.

which has its wire connection means projecting slightly outward from theforward end of said water heater reservoir, said electric heatingelecylindrical tube 386 is arranged to receive the ment being secured inthe water heater reservoir by the nut 425.

As shown in Fig. 9, electric current is supplied to the connectionplates M2 and M3 by the wires '5 426 and 421 which are connected to thebinding screws 429 and 436 and lead therefrom through the cuspidorsupporting arm and upwardly through the pedestal structure and throughthe voltage control switch 459, see Fig. 2-, downwardly to thetransformer 43i which is disposed in the water niche and cuspidormounting section 3, as shown in Fig. '1.

The temperature control switch 459 is thus arranged to control thetemperature of the water in the water heater reservoir 356 which isdisposed within the cuspidor arm, and also in the water syringe holder.31]. The temperature of the water may be increased in varying degreesby turning the control knob 466 of said switch in clockwise directionfrom the oil position.

delivered through the syringe 316, the valve controlling knob is turnedto shut off the Warm water directed from the water heater reservoir 356through the pipe 351, and is actuated to open the by-pass pipe 365 topermit water from the cold water supply pipe 366 to be directed therebyto the syringe.

Water may be completely shut off from both the water heater reservoir356 and the syringe 316 by the valve 368 which depends from the valveblock or body 363 and is arranged to control the flow of .water fromsaid block through the pipe 366 to said water heater reservoir 356.

The supporting standard which is composed of the several frame sectionsI, 2, 3, 4 and 5 is encased in a housing formed of a plurality ofsemicylindrical housing or casing sections which may be readilyassembled and removed and which are so yieldingly retained in assembledrelation to form the pedestal structure.

As shown in Fig. 3, the base flange 6 is encased by the complementarysemi-annular base flange housing sections 556 upon which thesemicyl-indrical base housing'sections 55l having the opposed intur-nedlateral edge flanges 552 are superposed. The opposite semicylindricalmargins 553 and 554 of said housing sections 55I are inset, see Fig. 4,and form regions of reduced diameter in the pedestal of the assembledstructure, as illustrated in Fig. 2.

That portion of the pedestal comprising the complementarysemicylindrical' housing sections 555 that encase the main body framesection 2 is shown in Figs. 3 and 7 and is typical of the severalhousing sections that comprise the pedestal casing structure, saidhousing sections 555 each having opposed inturned flanges 556 and 551,the flange 5560f each of the housing sections 555 being interrllpted bythe semicircular recesses 559 and 566 which cooperate to form circularapertures, through which the valves 665 and I I6 project, as best shownin-Fig. '6, when the complementary housing sections 555 are assembledwith said flanges 556 and 551 in relatively abutted relation.

As best shown in Fig. 6, the housing sections 555 have their flanges 556and 551 reduced in width at their upper and lower ends to provide therestricted regions 56I and'562 which are engaged in the notches 35 and36 in the flanges 2| and 22 respectively. Said ections 555 are insetbelow the flange 2| and above the flange 22 to provide the reducedsemicircular end margins 563 and 564 which, as shown in Fig. 2,cooperateto form regions of reduced diameter in the assembled structure.The upper or water niche portion of the cuspidor and water niche framesection 3 is arranged to be encased by the housing sections 565 and 561respectively having the relatively abutted inturned lateral marginalflange 558 and 559, as best shown in Fig. 12, which are arranged to bedetachably engaged in the notches 52 disposed in diametrically oppositerelation in the flange 39. i

As best shown in Figs. 7 and 12, the forward housing section 561 isprovided with the substantially rectangular aperture 570, the edgemargins of which are protected by the channeled frame 580 of thesemi-annular dome or cap housing,

sections 582 and 583 which have the relatively abutted inturned flanges585 and terminate short of the semicircular inner edges 586 of therespec tive dome or cap housing sections. 582 and 583.

As shown in Fig. 3, the inner edge margins of the horizontal top wall ofsaid dome or cap housing sections 582 and 583 overlap and rest upon theannular head 69 at the top of the dome or motor frame section 5.

The housing thus described is capped by the annular crown plate 589, seeFig. 3, which is slightly arched, having its outer peripheral edge 590curved downwardly and engaging the upper wall of the dome or cap housingcomprising the housing sections 582 and 583, and having its inner rim59.! curved upwardly and engaging the under surface of the enlargedcentral portion of the spacer sleeve '14, by which it'is retained in itsproper position to cover the pocket 19.

As shown in Figs. l and 2., the frame of the bracket table arm 91 isarranged to be encased in the readily removable and replaceable brackettable housing or casing section including the main housing section 592,the substantially semicircular inner end section' 593, and thesubstantially semi-circular outer end section 594.

s As shown in Fig. 2, the several regions of reduced diameter in thepedestal .casing are encircled by the girdling bands I9, 520, 52l, 522,

parting from the essential features ofmyinvem tion as defined inthe'appended claimsfi i Having thus described my invention, I claim: 1.A dental equipment assemblage comprising a plurality of separable framesections mounted one upon the other in coaxial relation and hairingflanges and a slideway, a cuspidor supporting frame having asemi-circular groove adapted'to engage said slideway, means arrangedtom'aintain said cuspidor supporting frame engaged with said slidewayand to permit the said ci1'spidor supporting frame to be movedhorizontally about the common axis or the several frame menibers, acasing for said frame members comprising a plurality of relativelyseparable sectionsformed of thin material arranged to be engaged withsaid frame members to enclose them in stationary relation, and a casingfor said cuspidoi' supporting frame comprising a plurality of relativelyseparable sections enclosing said frame andjrnovable therewith relativeto the sections which enclose the said frame members.

2. A dental equipment assemblage comprising a supporting standardstructure formed of a plurality of frame sections assembled oneuponanother about a unitary axis, a cuspidor supporting arm mounted toembrace said standard and 'to revolve about said axis, a cuspidormounted on said arm, a water distributor carried by said arm andconnected with said cuspidor, meansfarj- .ranged to control the flow ofwater through said distributor, a waste conduit extending through 523,524 and 525, not only serving as a means of utility but ofornamentation.

My invention has many advantages over similar devices as heretoforeconstructed for supporting parts and accessories in convenient positionfor I do not desire to limit my invention tothe precise details ofconstruction and arrangement as herein set forth, as it i obvious thatvarious modifications may be made therein without desaid structure andarm and connecting said cus- 3. A dental equipment assemblage comprisinga supporting standard structure formed of a plurality "of frame sectionsassembled about a .unitary axis and having an annular projection, anaccessory supporting arm projecting radially from said structure andarranged to revolve about said axis and having its inner portionembracing said, annular projection, means tending to maintain said armoperatively engaged with said annular projection, a conduit leadingwater through said arm to the accessories thereon, a casing for saidstandard structure having an opening affording a walled niche therein, atumbler supporting drip basin forming the base of said niche, a drainfixture having a pocketarranged to receive the waste from said basin,and also having a projection forming a valve having a seat, inlet andoutlet orifices leading into said valve and respectively connectingwater supply with an outlet fixture disposed in position to direct waterinto a tumbler that may be disposed in said basin, and-a valve plugcooperative with said seat to control the flow of water through saidoutlet fixture, and having means extending through said casing wherebyit may be manually operated, and means common to said arm and nichearranged to control the.

taryaxis and having an annular projection, an accessory supporting armprojecting radially from said structure and arranged to revolve aboutsaid axis and having its inner portion embracin said annular projection,means tending to maintain said arm operatively engaged with said annularprojection, a casing for said standard structure having a lateralopening affording a walled niche therein, a tumbler supporting dripbasin forming the bottom of said niche, a fluid passageway lead ingwater through said arm to the accessories carried thereby, a drainfixture having a pocket connecting said drip basin with a drain outlet,and having a valve provided with a chamber having inlet and outletpassageways respectively leading water from a Water supply to a tumblerin said basin, and means comprising a valve in said water by, a casingfor said standard structure having a niche recessed therein, a tiimblersupporting drip basin forming the bottom of said niche, a valve bodyincluding a chamber having inlet and outlet passageways respectivelyleading water from a source of water supply to the tumbler in said basinand also including a receptacle arranged to receive the drip from saidbasin and direct it through a suitable connection to a waste outlet, avalve plug arranged to control the water passing through said chamberand having means extending through said casing by which said plug may bemanually actuated, and a valve common to said arm and niche arranged tocontrol the flow of water from said source of supply to said passagewayand said inlet.

' 6. A dental equipment assemblage comprising a supporting standard, amovable support mounted to turn about the axis of said standard, a watersupply conduit leading through said standard and into said movablesupport, a syringe holder carried by said movable support, meansarranged to maintain said holder heated, a syringe normally supported bysaid holder, a flexible conveyer conmeeting said syringe and conduit andaffording freedom of movement of said syringe, and a weighted stoparranged to limit the withdrawal movement of said conveyor through saidholder,

and to effect its retraction,

' ROBERT C. ANGELL.

